Cholesterol is an important type of fat (lipid) that is made by the body and is necessary for it to function. It also is found in foods that are made from animal products (meat and dairy products).
Cells need cholesterol to function. However, excess cholesterol in the blood builds up in blood vessels and may lead to hardening of the arteries (atherosclerosis), heart disease, and stroke. People who have diabetes are at higher risk of developing atherosclerosis.